ThirdLove is an American lingerie and underwear brand founded in 2013 by Heidi Zak and her husband David Spector in San Francisco, California. The brand was created to solve the problem of ill-fitting bras by introducing half-cup sizes, a revolutionary innovation that expanded the range of available fits. ThirdLove pioneered a data-driven approach to bra fitting through its Fit Finder quiz, which uses machine learning to recommend the perfect bra size based on individual body measurements and preferences. The brand offers an extensive range of bras, underwear, loungewear, and sleepwear in over 80 sizes, from AA to I cups. ThirdLove's products are designed with comfort-first fabrics and thoughtful construction, including features like memory foam cups and tagless designs. The company launched as a direct-to-consumer online brand, disrupting the traditional lingerie retail model and challenging dominant players like Victoria's Secret. ThirdLove has been vocal about body diversity and inclusivity, featuring real women of various sizes and backgrounds in its marketing. The brand has expanded from its digital roots into select retail partnerships while maintaining its commitment to fit innovation and inclusive sizing. ThirdLove has raised over $68 million in funding and has served millions of customers since its founding.
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